Wood-polishing machine.



W. I. SUMNER. WOOD POLISHING MACHINE. APPLICATION FILED NOV. 17. I914.

1,150,155. Patented Aug. 17', 1915.

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W. J. SUMNER.

WOOD POLISHING MACHINE. APPLICATION HLED Nov 11,1914.

1, 1 50, 1 55 I Patented Aug. 17, 1915.

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WOOD POLISHING MACHINE.

APPLICATION FILED NOVDII. 1914.

1,150,155. I Patented Aug. 17, 1915.

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awe/W601 T W WilierJkSzzmm UNXTED sra'rns ATEN W E WALTER J. SUMNER, orMINNEAPOLIS, 'iviinivnsore. V

Specification of Letters Patent. Patented Aug, 17 1915.

Application filed November 17, 1914. Serial N 0. 872,632.

To all whom it may concern:

Be it known that I, VVALTERJ. SUMNER, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented newaand useful Improvements in Wood PolishingMachines, of which the following is a speciiication.

to produce a machine 0f.the characterre ferred to which is particularlydesigned for polishing or finishing work or stock having an irregular orundulatory surface, the machine of this invention embodying a pluralityof endless polishing belts which run over shaper blocks any number ofwhich may be interchangeably used in the machine thus adapting aplurality of shaper blocks to be employed for different kinds of workdepending on the surface to be polished.

A further object of theinvention is to provide in a machine of the classreferredto a work -holder which is universally.

mounted so that it maybe moved laterally or in a fore and aft directionandbrought to any point whatever with respect to the polishing belts,means being provided for vertically adjusting the work holder andv alsofor feeding said holder and the work carried thereby in relation to thepolishing belts. 1

l/Vith the above and other ob ects in view, the invention consists inthe novel construction, combination and arrangement of parts,

as herein described, illustrated and claimed.

In the accompanying drawings:Figure of the supporting carriage therefor,taken Fig. 7 1s a detail 1 on a still larger scale. 7 horizontal sectionon the line 77 of Fig.

1. Fig. S-is a fragmentary vertical section F ig." 9 is a fragmentarysectional view showing one of the shaper blocks and portionsof oneshowing one of thebelt 'tighteners.

of the polishing belts and head frame.

Referring to the drawings A'generally designates the. machine framewhich maybe of any desired size and shape to support the operative partshereinafter particularly described. At a suitable elevation, oppositelyarranged paralleltrack rails 1 are arranged just within the side membersof the frame A and rendered vertically adjustable by meansof a pair ofthreaded adjusting shafts 2 thelower ends of which are stepped in p Ibearings 3 on the frame A and the upper This invention relates to woodpollsh ng machines, the object of the invention belng endsof which arealso journaled in bearings 4 andprovided at their upper extremitiesvided at one end with an operating crank handle 9 enabling both of theadjusting I screws or shafts 2 to be'simultaneously and equally turnedfor the purpose of raising and lowering the track rails 1. These track 7rails, are steadied by means of guides 10 on the frame A as shown inFig. Q.

Mounted upon the track rails 1 is a carriage 11 the same being providedwith wheels or rollers 12' adapted to travel along the track rails'l,said track rails extending in a fore and aft direction or from thefront, to the rear of themachine. 'Mounted upon thecarriage 11 is a workholder 13which is illustrated in detail in Figs. 5 and 6, said workholder comprising a suitable marginal 4 frame, to which the referencenumeral 13 is applied, and a tableltsupportediby said frame. iAdjacentto. the opposite sides of the frame ofv the work holder, the latter isprovided with shafts 15;and 16 parallel-to each other, eachlof whichisprovided adja-= cent to 'its opposite. extremities with spur gears17.which engage the teeth of parallel. racks 18 on the upper surface ofthe carriage 11, the racks 18' extending in a direct1on perpendicular orat right angles tothe movement of the carriage 11 on the track rails '1.The shaft 15 is provided at one extremity with a crank handle 19enabling one ofsaid shafts tobe revolved for the purpose I of feedingthe work holder 13 transversely of the machine and acrossthe carriage11.

,On its upper side the work holder is provided with'clamps 20 and 21 oneof which isv made adjustable as shown in Fig. 5 by providing the table14: with slots 22 extending transversely thereof and receivingclampingbolts 23. By loosening these bolts, the clamp 21ymay be movedtoward and. away from the clamp 20 so as toaccoms modate workofdifferent, sizes and enable the same to be securely fastened to the Workholder. The work holder may be readilyproviding the head frame withvertical grooves 27 as best illustrated in Figs. 1 and 7, the grooves 27being adapted to receive vertical ribs 28 on a pair of guides 29 whichare shown as fastened to the frame'A by means of screws or theirequivalent.

To the lower end and inner face of each of the sidebars 21 of the headframe B is secured a shaper block 31 having a rounded lower end as shownin Fig. 1. This block, as shown in Fig. 9, is detachably secured to theadjacent side bar 24: of the head frame B'by means of fasteners 32 sothat interchangeable shaper blocks of different sizes and shapes may beemployed according to the nature of the surface being; operated upon. Atthe upper end of the head frame B are pulleys 33 which as shownin Figs.1 and 8 are adjustable for the purpose of tightening the respectiveendless polishing belt C. To that end the adjacent side bar 2% isprovided with a vertical slot 34; in which is a slidable bearing 35 forthe shaft 36 of the said pulley 33. An adjusting screw 37 has a swiveledconnection at 38 with the slidable bearing 35 and a threaded connectionat 39 with the frame bar 24. Therefore, by turning the screw 37, thepulley 33 may be adjusted for the purpose of taking up slack in theendless polishing belt. C.

.Each of the endless polishing belts G, two

of such belts being shown, after passing around the pulley 33 and theshaper block 31, passes over pulleys 40 and 41 journaled' on stud shafts42' supported by the machine frame A. Each belt then passes around oneof a pair of driving pulleys 13 on driving shafts 14 arranged atopposite sides of the" machine and each equipped with a driving pulley4:5 and an. idler pulley 46 either of which is adapted to receive anindependent driving belt a7. In connection with each belt 47 I employ abelt shifter 4-8 so that either one of the endless polishing belts maybe thrown into or out of operation. They may be driven individually orcollectively according to the nature of the work per polishing beltsagainst the work with any desired pressure, said handles also enablingthe operator to lift the polishing belts quickly off the work before andafter the polishing operation.

As shown in Fig. 2 the machine hereinabove described may be made quitenarrow and compact, the work holder 13 being movable beneathtlie'polishing belts and from one to the other as may be required. Inone and the same machine, a plurality of shaper blocks 31 may be usedsimultaneously thereby enabling a portion of the work to be performed byone belt and another portion by another belt. By reason of theconstruction set forth shaper blocks of different sizes I and shapes maybe used according to the irregular or undulatory character of thesurface being polished. In case of extra large work, the work holder 13may be lifted off the carriage 11 and the work or stock may be placeddirectly on said carriage. The supporting track rails 1 may be adjustedup and down to accommodate Work of any size or thickness.

WVhatI claim is 1. In a polishing machine, the combination of a machineframe, a horizontally movable work holder, vertically adjustable supporting and guiding means for said work holder, a vertically movablepolishing head frame located wholly above said table, a handle rigidlyfastened to said head frame for manually sliding the latter up and down,guides on the machine frame for said head frame, a plurality of endlesspolishing belts, pulleys on saidhead frame around which said belts pass,driving pulleys for said belts on the machine frame, andcounterbalancing means for said head frame.

"2. In a polishing machine, the eombina tion of a machine frame, ahorizontally movable work holder, vertically adjustable supporting andguiding means for said work holder, a vertically movable polishing headframe, guides on the machine frame for said head frame located whollyabove said table, a handle rigidly fastened to said head frame formanually sliding the latterup and down, a plurality of endlesspolishing'belts, pulleys on said head frame around which said beltspass, driving pulleys for said belts on the machine frame means forthrowing one or more of said belts into and out of operation, andcounterbalancing means for said head frame.

3. In a'polishing machine, the combination of a machine frame, ahorizontally movable work holder, vertically adjustable supporting andguiding means for said work holder, a vertically movable polishing headframe, guides on the machine frame for said head frame located whollyabove said table, a handle rigidly fastened to said head frame formanually sliding the latter upand down,

I a plurality of endless polishing belts, pulpolishing head framelocated Wholly above formanually sliding the latter up and down,

guides on the machine frame for said head frame, aplurality of endlesspolishing belts, pulleys and shaper blocks on said head frame aroundWhich said belts pass, driving pulleys for said belts on the machineframe, and counterbalancing means for said head frame. V i

5. In a polishing machine, the combination of a machine frame, ahorizontally movable carriage, a horizontally movable Work holdershiftable at a right angle to the movement of the carriage, verticallyadjustable supporting and guiding means for said Work holder, rack andpinion mechanism for shiftingsaid Work holder, a vertically movable saidtable, a handle rigidly fastened to said head frame for manually slidingthe latter up and doWn, guides on the machine frame for said head frame,a plurality of endless polishing belts, pulleys on said vhead framearound Which said belts pass, and driving pulleys for said belts on themachine frame.

6. In a polishing machine, the combination of a machine frame, ahorizontally movable carriage, a horizontally movable Work holdersupported by said carriage and shiftable in a plane perpendicular to thecarriage, vertically adjustable supporting and guiding means for saidcarriage and Work holder, a vertically movable polishing head framelocated Wholly above said table, a handle rigidly fastened to said headframe for manually sliding the latter up and down, guides on the machineframe for said head frame, a plurality ofendless polishing belts,

pulleys on said head frame around Which a said belts pass, drivingpulleys for said belts on the machine frame, and counterbalancing 7means for said head frame.

In testimony whereof I affix my signature in presence of tWo Witnesses.

' WALTER J. SUMNER.

Witnesses:

FRED E. BADNEY, G. E. SANDEEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. 0.

